Shuttles for looms for weaving



Dec. 29, 1959 w. HOLT 2,918,948

SHUTTLES FOR LOOMS FOR WEAVING Filed Jan. 14, 1959 2 Sheets-Sheet l F/G.l-

INVENTOR ATTORNEY Dec. 29, 1959 w. HOLT SHUTTLES FOR LOOMS FOR WEAVING 2Sheets-Sheet 2 Filed Jan. 14, 1959 ATTORNEY5 invention.

v of the invention;

.U rsd SW P t 7 Claims priority, application Greatl tritain March 7,1958

- This invention relates to improvements in shuttles for looms forweaving, and more particularly tov shuttles for automatic looms of thetype in whicha pirn is mounted in the shuttle between spring jaws of astirrup member. In shuttles for automatic looms in which a cop changingmechanism 'is provided for automatically ejecting an empty-copandreplacing-it by a full cop the head of the pirn is formed with ringswhich engage serrated spring jaws carried by a stirrup member secured inthe shuttle by a bolt passing fromside to side of the shuttle through acylindrical bore in the member. It has-been found that the constantvibration of the shuttles and the force exerted" on the, jaws duringchanging the c'op causes thestirrup member'to'become loose in theshuttledue to wear. on the bolt and shuttle.

The object of the present invention is to provide means for securing thestirrup member. u l .7 v

According to the invention the stirrup member is more securely in theformed with an angled non-cylindrical bore to receive cor-" respondinglyshaped locking blocks engaging a recess in the shuttle head. t v

The invention will be described with reference to the accompanyingdrawings: V 1 Figure 1 is an exploded perspective view of a shuttle noseand a stirrup member having a locking block assembly secured theretoaccording Figure 2' is a planview partly in section of the shuttle noseassembly of Figure 1;

Figure 3 is a perspective view of another form of stirrup member andlocking block;

Figure 4 is av plan view partly in section showing a shuttle noseassembly according to a further embodiment Figure Sis a perspective viewshowing a stirrup mem- 'ber and locking block according tostill anotherembodiment of the invention;

Figure 6 is a perspective view showing a stirrup membei and lockingblock according to a still further form of the invention;

Figure 7. is a perspective view of a locking block according to stillanother embodiment of the present invention. 1

v A shuttle A is provided with a stirrup member B having serrated springjaws b for engaging a pirn in known manner. v

The stirrup member B is formed withan angled nonshuttle. The stirrupmember B is secured in position in the shuttle head A by the'block Cwhich is formed with a tapered face'to engage the taper in the bore banda narrower block C formed with parallel sides which to one embodimentof the .a i s-smallest at its entrance.

a, 2,918,948 Patented Dec. 29,v 1959 are pressed intothe bore b toengage one of the parallel sides of the block C and the bore b Thelarger end of the block C enters a recess or cavity a? in the shuttlehead A and is prevented from emerging on the reed side a of the shuttleby a portion of the shuttle defining an end wall surface for the cavitya Referring to Figure 2, the cavity a has a tapered wall surfaceadjacent the nose of the shuttle A which corresponds to the taperedwallsurface'of the block C so that the cavity In the assembly of thelocking blocks in the cavity, the large block C is first inserted intothe cavity a and is dimensioned so that the wider end just clears theentrance to the cavity 11 This block C is then moved into the positionshown in Figure 2 andthe narrower. block c is thereafter insertedthrough the entrance of cavity a to establish a snug fit of the lockingblock in the cavity a A locking pin or screw 0 may be employed to securethe block C in position. The end of the block C may be bent over toreceive the pin 0, (Fig. 2) which screws into the block C.

The head of the stirrup member B may be solid (Fig.

2) or may be formed from a strip of metal bent to prohole d in the plateD or it may be secured by a screw.

The bolt d passes also through a hole a in the shuttle 30 .head (Figs. 1and 5)..

, d (Fig. 5 or a hole c may beformed in the block C to receive a tongueqi on the packing D (Figs. 3 andv 4) The block C may berecessed tobelocked by the bolt or the block C may be grooved (Fig. 6) to receive'arecessed end of the packing D or a projecting portion thereon (Fig. 7).

A variation in the position of the tapered block may be used foralignment of the pirn in the shuttle.

The bore b in the stirrup member B may be square, oblong or of othernon-cylindrical form and taper from the inside towards the side of theshuttle remote from the reed.

' The locking blocks CC may be of metal, hard wood or of artificial orsynthetic material.

In order to dismantle the stirrup member B a small bore a may extendthrough the shuttle from the reed side a to receive a tool a by whichthe block C may be driven out of cavity a after which the block C may belifted out.

The shock and pressure on the jaws B when the automatic loom is changingthe pirn is better resisted by the corners and planes against the wallsof the slot than is the case where a round bolt is used which may turnround and the nut work loose on the thread, or the jaws may move aroundthe bolt and wear, thus causing the weft to break while weaving becausethe pirn is out of alignment. The locking blocks CC cannot work out atthe back of the shuttle because of the solid wooden wall.

A lining may be provided in the shuttle to receive the blocks ifdesired.

The arrangement may be employed in non cop changing shuttles where thepirn is mounted on a pivoted skewer and turned down into the weavingposition to engage the jaws.

I claim:

1. A shuttle for looms for weaving comprising a shuttle nose having atapered recess therein, a stirrup member for securing a pirn in positionin the shuttle having a tapered passage therethrough and a locking blockhaving a tapered surface corresponding to the taper of said recess andsaid passage for securing the stirrup member in the shuttle nose toprevent movement of the stirrup member therein.

2. A shuttle for looms for weaving comprising a shuttle nose having afirst tapered recess and a second recess intersecting said first recess,a stirrup member for securing a pirn in position in the shuttle andhaving a portion projecting into said second recess, said portion havingthrough tapered passage means disposed in said first recess wherein thetaper of said passage means is in the same direction and corresponds tothe taper of said first recess and a locking block extending into saidfirst recess and through said passage means, said locking block having atapered wall surface corresponding and in bearing relation to the tapersof said passage means and said first recess for securing the stirrupmember in the shuttle nose to prevent movement of the stirrup membertherein.

3. A shuttle for looms for weaving comprising a shuttle nose having atapered recess therein, a stirrup member for securing a pirn in positionin the shuttle having a through tapered passage disposed in said recess,locking block means for securing the stirrup member in the shuttle noseto prevent movement of the stirrup member therein and comprising alocking block and a rectangular shaped block projecting into said recessand through said passage in juxtaposition bearing relation to eachother, said locking block having a taper surface extending in the samedirection as and adjacent to the tapered surface of said recess.

4. A shuttle for looms for weaving comprising a shuttle nose having atapered recess therein, a stirrup member for securing a pirn in positionin the shuttle having a tapered through passage disposed in said recess,means for securing the stirrup member in the shuttle nose to preventmovement of the stirrup member therein and comprising a tapered lockingblock having a direction of taper cor- 4 responding to the direction oftaper of said recess and said passage and a rectangular locking blockadjacent said tapered locking block, said blocks extending into saidrecess and through said passage, a jaw cover plate and a bolt forsecuring the jaw cover plate and locking the rectangular block in theshuttle head.

5. A shuttle for looms for weaving comprising a shuttle nose having atapered recess therein, a stirrup member for securing a pirn in positionin 'the' shuttle having a tapered throughpassage, means for securing thestirrup member in the shuttle nose to prevent movement of the stirrupmember therein and comprising'atapered locking block having a directionof taper corresponding to the direction of taper ofsaid'recess in saidpassage and a r ctangular locking block adjacent said tapered lockingblock, said blocks extending into said recess and through said passage,a jaw cover plate and a bolt for securing the jaw cover plate in theshuttle, a packing member and a tongue thereon for entering between thestirrup member to engage in the rectangular block.

6. A shuttle for looms for weaving as in claim 5 wherein means areprovided in at leastone of said blocks for defining at least one grooveto receive at least one tongue on the packing member.

7. A shuttle for looms -for weaving as in claim 5 in which a bore isformed in the shuttle nose to receive a tool for the removal of theblocks;

References Cited in the file of this patent UNITED STATES PATENTS

